Expansion Joint Bolt Circle Diameter 4 3/4 in Bolt Hole Size 3/4 in Bolt Hole Threading Unthreaded Burst Pressure 853 psi Compression Distance 2 in Connection Type Flanged Expansion Distance 1 1/8 in Expansion Joint Type Double Bulb Features Absorbs Pipe Movement and Stress Flange Diameter 6 in Flange Material Steel Flange Material Finish Zinc-Plated For Fluid Type Air Gas Hydraulic Fluid Water Joint Material Neoprene Joint Material Finish Not Applicable